remove engine from llvm-config

Due to some changes on llvm's libraries, the output
of running `llvm-config engine` doesn't include some
libs which are needed for compiling clang_delta, e.g.,
libLLVMMSP430Desc.a, libLLVMMSP430AsmPrinter.a, etc.

Fixed it by obtaining all llvm libs.

clang_delta/Makefile.am

@@ -22,7 +22,7 @@ GIT_FLAG = -DGIT_VERSION=\"$(GIT_HASH)\"
 LLVMCXXFLAGS	:= $(shell "$(LLVM_CONFIG)" --cxxflags)
 LLVMLDFLAGS	:= $(shell "$(LLVM_CONFIG)" \--ldflags)
 LLVMINCLUDEDIR	:= $(shell "$(LLVM_CONFIG)" --includedir)
-LLVMLIBS	:= $(shell "$(LLVM_CONFIG)" \--libs engine)
+LLVMLIBS	:= $(shell "$(LLVM_CONFIG)" \--libs)
 
 clang_delta_CPPFLAGS = \
 	$(GIT_FLAG) \

clang_delta/Makefile.in

@@ -277,7 +277,7 @@ GIT_FLAG = -DGIT_VERSION=\"$(GIT_HASH)\"
 LLVMCXXFLAGS := $(shell "$(LLVM_CONFIG)" --cxxflags)
 LLVMLDFLAGS := $(shell "$(LLVM_CONFIG)" \--ldflags)
 LLVMINCLUDEDIR := $(shell "$(LLVM_CONFIG)" --includedir)
-LLVMLIBS := $(shell "$(LLVM_CONFIG)" \--libs engine)
+LLVMLIBS := $(shell "$(LLVM_CONFIG)" \--libs)
 clang_delta_CPPFLAGS = \
 	$(GIT_FLAG) \
 	-I"$(LLVMINCLUDEDIR)/clang"

configure

@@ -15598,7 +15598,7 @@ See \`config.log' for more details" "$LINENO" 5; }
   LLVM_BINDIR=`$LLVM_CONFIG --bindir`
   LLVM_CPPFLAGS=`$LLVM_CONFIG --cxxflags`
   LLVM_LDFLAGS=`$LLVM_CONFIG --ldflags`
-  LLVM_LIBS=`$LLVM_CONFIG --libs engine`
+  LLVM_LIBS=`$LLVM_CONFIG --libs`
 
   # The output of `llvm-config --ldflags' often contains library directives
   # that must come *after* all the LLVM libraries on the link line: e.g.,
@@ -15615,8 +15615,8 @@ See \`config.log' for more details" "$LINENO" 5; }
   LIBS="$LIBS $LLVM_LIBS $LLVM_LDFLAGS"
   # LIBS="$LIBS $LLVM_LIBS" --- see comment above.
 
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking can compile with and link with LLVM(engine)" >&5
-$as_echo_n "checking can compile with and link with LLVM(engine)... " >&6; }
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking can compile with and link with LLVM" >&5
+$as_echo_n "checking can compile with and link with LLVM... " >&6; }
 if ${ax_cv_llvm+:} false; then :
   $as_echo_n "(cached) " >&6
 else