Added support for big-endian 32-bit MIPS kernels. Only native MIPS

crash binaries may be built with big-endian support; running the
"make target=MIPS" build option on an x86 or x86_64 host creates
x86 binaries with little-endian support only.
(rabin@rab.in)

configure.c

@@ -375,7 +375,7 @@ get_current_configuration(struct supported_gdb_version *sp)
 #ifdef __aarch64__
         target_data.target = ARM64;
 #endif
-#ifdef __mipsel___
+#ifdef __mips__
         target_data.target = MIPS;
 #endif
 
@@ -1325,7 +1325,7 @@ make_spec_file(struct supported_gdb_version *sp)
 	printf("Vendor: Red Hat, Inc.\n");
 	printf("Packager: Dave Anderson <anderson@redhat.com>\n");
 	printf("ExclusiveOS: Linux\n");
-	printf("ExclusiveArch: %%{ix86} alpha ia64 ppc ppc64 ppc64pseries ppc64iseries x86_64 s390 s390x arm aarch64 ppc64le\n");
+	printf("ExclusiveArch: %%{ix86} alpha ia64 ppc ppc64 ppc64pseries ppc64iseries x86_64 s390 s390x arm aarch64 ppc64le mips mipsel\n");
 	printf("Buildroot: %%{_tmppath}/%%{name}-root\n");
 	printf("BuildRequires: ncurses-devel zlib-devel bison\n");
 	printf("Requires: binutils\n");