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Disable the MULTILIB_OSDIRNAMES and other multilib options.

Hard coding the MULTILIB_OSDIRNAMES with ../lib64 is causing problems on
systems where the libdir is NOT set to /lib64.  This is allowed by the ABI, as
long as the dynamic loader is present in /lib.

We simply want to use the default rules in gcc to find and configure the 
normal libdir.

Signed-off-by: Mark Hatle <mark.hatle@windriver.com>

Index: gcc-4.9.1/gcc/config/aarch64/t-aarch64-linux
===================================================================
--- gcc-4.9.1.orig/gcc/config/aarch64/t-aarch64-linux
+++ gcc-4.9.1/gcc/config/aarch64/t-aarch64-linux
@@ -21,11 +21,11 @@
 LIB1ASMSRC   = aarch64/lib1funcs.asm
 LIB1ASMFUNCS = _aarch64_sync_cache_range
 
-AARCH_BE = $(if $(findstring TARGET_BIG_ENDIAN_DEFAULT=1, $(tm_defines)),_be)
-MULTILIB_OSDIRNAMES = .=../lib64$(call if_multiarch,:aarch64$(AARCH_BE)-linux-gnu)
-MULTIARCH_DIRNAME = $(call if_multiarch,aarch64$(AARCH_BE)-linux-gnu)
+#AARCH_BE = $(if $(findstring TARGET_BIG_ENDIAN_DEFAULT=1, $(tm_defines)),_be)
+#MULTILIB_OSDIRNAMES = .=../lib64$(call if_multiarch,:aarch64$(AARCH_BE)-linux-gnu)
+#MULTIARCH_DIRNAME = $(call if_multiarch,aarch64$(AARCH_BE)-linux-gnu)
 
 # Disable the multilib for linux-gnu targets for the time being; focus
 # on the baremetal targets.
-MULTILIB_OPTIONS    =
-MULTILIB_DIRNAMES   =
+#MULTILIB_OPTIONS    =
+#MULTILIB_DIRNAMES   =