Merge from svn://gcc.gnu.org/svn/gcc/branches/linaro/gcc-4_8-branch

Change-Id: I86aa212279ea5ca22d8094bd0282a73bf4091343
libsanitizer/configure.tgt: Remove ARM pattern

Commit 122057 introduced build breakage, so remove this until
fixed by Linaro.

Change-Id: I1576015c312f1288c0768569516eb979a1e2fdc3