Revert "Fix volantis boot."

Bug: http://b/20065774
This reverts commit 76e1cbca75.

libc/Android.mk

@@ -1379,8 +1379,7 @@ LOCAL_LDFLAGS := -Wl,--version-script,$(LOCAL_PATH)/version_script.txt
 # We'd really like to do this for all architectures, but since this wasn't done
 # before, these symbols must continue to be exported on LP32 for binary
 # compatibility.
-# TODO: disabled for http://b/20065774.
-#LOCAL_LDFLAGS_64 := -Wl,--exclude-libs,libgcc.a
+LOCAL_LDFLAGS_64 := -Wl,--exclude-libs,libgcc.a
 
 # TODO: This is to work around b/19059885. Remove after root cause is fixed
 LOCAL_LDFLAGS_arm := -Wl,--hash-style=sysv

libc/arch-arm64/arm64.mk

@@ -40,8 +40,6 @@ libc_bionic_src_files_arm64 += \
     arch-arm64/bionic/syscall.S \
     arch-arm64/bionic/vfork.S \
 
-# Work around for http://b/20065774.
-libc_bionic_src_files_arm64 += arch-arm64/bionic/libgcc_compat.c
 
 libc_crt_target_cflags_arm64 := \
     -I$(LOCAL_PATH)/arch-arm64/include

libc/arch-arm64/bionic/libgcc_compat.c

@@ -1,11 +0,0 @@
-/* STOPSHIP: remove this once the flounder blobs have been rebuilt (http://b/20065774). */
-
-extern void __clear_cache(char*, char*);
-extern char _Unwind_Backtrace;
-extern char _Unwind_GetIP;
-
-void* __bionic_libgcc_compat_symbols[] = {
-    &__clear_cache,
-    &_Unwind_Backtrace,
-    &_Unwind_GetIP,
-};

libc/version_script.txt

@@ -1,9 +1,4 @@
 LIBC {
-  global:
-    /* Work-around for http://b/20065774. */
-    __clear_cache;
-    _Unwind_Backtrace;
-    _Unwind_GetIP;
   local:
     _ZSt7nothrow;
     _ZdaPv;