[Driver] Fix missing MultiArch include dir on powerpcspe

[glaubitz]

Summary

On powerpc-linux-gnuspe, the header files are located in their
own include directory named /usr/lib/powerpc-linux-gnuspe,
so add this directory to PPCMultiarchIncludeDirs.

[glaubitz]

I don't have commit access, btw. So it would be nice if someone else could commit this for me.

Thanks!

[kristina]

LGTM.

In the future please make sure you supply all patches with context (ie. -U99999), without context they may be harder to review and more importantly patch may mess up.

[lebedev.ri]

cfe/trunk/lib/Driver/ToolChains/Linux.cpp

701

This is probably missing test coverage?
It seems, some of these are tested, but not all:

clang/test$ find -iname include | grep tree | wc -l
112

[glaubitz]

Not sure how this is supposed to be tested as this requires a proper Debian powerpcspe chroot.

I also checked saw that not all mips64 include paths are covered by the testsuite.

cfe/trunk/lib/Driver/ToolChains/Linux.cpp

void Linux::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
   const StringRef MIPSMultiarchIncludeDirs[] = {"/usr/include/mips-linux-gnu"};
   const StringRef MIPSELMultiarchIncludeDirs[] = {
       "/usr/include/mipsel-linux-gnu"};
   const StringRef MIPS64MultiarchIncludeDirs[] = {
       "/usr/include/mips64-linux-gnu", "/usr/include/mips64-linux-gnuabi64"};
   const StringRef MIPS64ELMultiarchIncludeDirs[] = {
       "/usr/include/mips64el-linux-gnu",
       "/usr/include/mips64el-linux-gnuabi64"};
   const StringRef PPCMultiarchIncludeDirs[] = {
-      "/usr/include/powerpc-linux-gnu"};
+      "/usr/include/powerpc-linux-gnu",
+      "/usr/include/powerpc-linux-gnuspe"};
   const StringRef PPC64MultiarchIncludeDirs[] = {
       "/usr/include/powerpc64-linux-gnu"};
   const StringRef PPC64LEMultiarchIncludeDirs[] = {
       "/usr/include/powerpc64le-linux-gnu"};
   const StringRef SparcMultiarchIncludeDirs[] = {
       "/usr/include/sparc-linux-gnu"};
   const StringRef Sparc64MultiarchIncludeDirs[] = {
       "/usr/include/sparc64-linux-gnu"};