Revert "gcc, binutils: Get rid of 32-bit ARM configure flag exception"

This commit breaks native armv7l-linux builds. Revert it until it can
be root-caused. This reversion does not affect other platforms or
cross-compiling.

This reverts commit 0f5c804.

pkgs/development/compilers/gcc/4.5/default.nix

@@ -256,7 +256,11 @@ stdenv.mkDerivation ({
     ;
 
   # TODO(@Ericson2314): Always pass "--target" and always prefix.
-  configurePlatforms = [ "build" "host" ] ++ stdenv.lib.optional (targetPlatform != hostPlatform) "target";
+  configurePlatforms =
+    # TODO(@Ericson2314): Figure out what's going wrong with Arm
+    if hostPlatform == targetPlatform && targetPlatform.isArm
+    then []
+    else [ "build" "host" ] ++ stdenv.lib.optional (targetPlatform != hostPlatform) "target";
 
   configureFlags =
     # Basic dependencies

pkgs/development/compilers/gcc/4.8/default.nix

@@ -298,7 +298,11 @@ stdenv.mkDerivation ({
   dontDisableStatic = true;
 
   # TODO(@Ericson2314): Always pass "--target" and always prefix.
-  configurePlatforms = [ "build" "host" ] ++ stdenv.lib.optional (targetPlatform != hostPlatform) "target";
+  configurePlatforms =
+    # TODO(@Ericson2314): Figure out what's going wrong with Arm
+    if hostPlatform == targetPlatform && targetPlatform.isArm
+    then []
+    else [ "build" "host" ] ++ stdenv.lib.optional (targetPlatform != hostPlatform) "target";
 
   configureFlags =
     # Basic dependencies

pkgs/development/compilers/gcc/4.9/default.nix

@@ -307,7 +307,11 @@ stdenv.mkDerivation ({
   dontDisableStatic = true;
 
   # TODO(@Ericson2314): Always pass "--target" and always prefix.
-  configurePlatforms = [ "build" "host" ] ++ stdenv.lib.optional (targetPlatform != hostPlatform) "target";
+  configurePlatforms =
+    # TODO(@Ericson2314): Figure out what's going wrong with Arm
+    if hostPlatform == targetPlatform && targetPlatform.isArm
+    then []
+    else [ "build" "host" ] ++ stdenv.lib.optional (targetPlatform != hostPlatform) "target";
 
   configureFlags =
     # Basic dependencies

pkgs/development/compilers/gcc/5/default.nix

@@ -316,7 +316,11 @@ stdenv.mkDerivation ({
   dontDisableStatic = true;
 
   # TODO(@Ericson2314): Always pass "--target" and always prefix.
-  configurePlatforms = [ "build" "host" ] ++ stdenv.lib.optional (targetPlatform != hostPlatform) "target";
+  configurePlatforms =
+    # TODO(@Ericson2314): Figure out what's going wrong with Arm
+    if hostPlatform == targetPlatform && targetPlatform.isArm
+    then []
+    else [ "build" "host" ] ++ stdenv.lib.optional (targetPlatform != hostPlatform) "target";
 
   configureFlags =
     # Basic dependencies

pkgs/development/compilers/gcc/6/default.nix

@@ -319,7 +319,11 @@ stdenv.mkDerivation ({
   dontDisableStatic = true;
 
   # TODO(@Ericson2314): Always pass "--target" and always prefix.
-  configurePlatforms = [ "build" "host" ] ++ stdenv.lib.optional (targetPlatform != hostPlatform) "target";
+  configurePlatforms =
+    # TODO(@Ericson2314): Figure out what's going wrong with Arm
+    if hostPlatform == targetPlatform && targetPlatform.isArm
+    then []
+    else [ "build" "host" ] ++ stdenv.lib.optional (targetPlatform != hostPlatform) "target";
 
   configureFlags =
     # Basic dependencies

pkgs/development/compilers/gcc/7/default.nix

@@ -312,7 +312,11 @@ stdenv.mkDerivation ({
   dontDisableStatic = true;
 
   # TODO(@Ericson2314): Always pass "--target" and always prefix.
-  configurePlatforms = [ "build" "host" ] ++ stdenv.lib.optional (targetPlatform != hostPlatform) "target";
+  configurePlatforms =
+    # TODO(@Ericson2314): Figure out what's going wrong with Arm
+    if hostPlatform == targetPlatform && targetPlatform.isArm
+    then []
+    else [ "build" "host" ] ++ stdenv.lib.optional (targetPlatform != hostPlatform) "target";
 
   configureFlags =
     # Basic dependencies

pkgs/development/compilers/gcc/snapshot/default.nix

@@ -299,7 +299,11 @@ stdenv.mkDerivation ({
   dontDisableStatic = true;
 
   # TODO(@Ericson2314): Always pass "--target" and always prefix.
-  configurePlatforms = [ "build" "host" ] ++ stdenv.lib.optional (targetPlatform != hostPlatform) "target";
+  configurePlatforms =
+    # TODO(@Ericson2314): Figure out what's going wrong with Arm
+    if hostPlatform == targetPlatform && targetPlatform.isArm
+    then []
+    else [ "build" "host" ] ++ stdenv.lib.optional (targetPlatform != hostPlatform) "target";
 
   configureFlags =
     # Basic dependencies

pkgs/development/tools/misc/binutils/default.nix

@@ -91,7 +91,11 @@ stdenv.mkDerivation rec {
     else "-static-libgcc";
 
   # TODO(@Ericson2314): Always pass "--target" and always targetPrefix.
-  configurePlatforms = [ "build" "host" ] ++ stdenv.lib.optional (targetPlatform != hostPlatform) "target";
+  configurePlatforms =
+    # TODO(@Ericson2314): Figure out what's going wrong with Arm
+    if hostPlatform == targetPlatform && targetPlatform.isArm
+    then []
+    else [ "build" "host" ] ++ stdenv.lib.optional (targetPlatform != hostPlatform) "target";
 
   configureFlags = [
     "--enable-targets=all" "--enable-64-bit-bfd"