arm-linux: Add libitm support.

	* config/arm/hwcap.h, config/arm/hwcap.cc: New files.
	* config/arm/sjlj.S, config/arm/target.h: New files.
	* config/generic/asmcfi.h (cfi_adjust_cfa_offset): New.
	(cfi_rel_offset): New.
	* config/linux/futex_bits.h: New file.
	* config/linux/futex.cc: Include futex_bits.h here...
	* config/linux/futex.h: ... not here.
	* Makefile.am (libitm_la_SOURCES) <ARCH_ARM>: Add hwcap.cc.
	* configure.ac (ARCH_AM): New conditional.
	* Makefile.in, configure: Rebuild.
	* configure.tgt: Handle ARM.

From-SVN: r182355
diff --git a/libitm/configure.ac b/libitm/configure.ac
index 45ee870..ab2a90b 100644
--- a/libitm/configure.ac
+++ b/libitm/configure.ac
@@ -273,6 +273,7 @@
 fi
 AC_SUBST(link_itm)
 
+AM_CONDITIONAL([ARCH_ARM], [test "$ARCH" = arm])
 AM_CONDITIONAL([ARCH_X86], [test "$ARCH" = x86])
 AM_CONDITIONAL([ARCH_X86_AVX], [test "$libitm_cv_as_avx" = yes])
 AM_CONDITIONAL([ARCH_FUTEX], [test $enable_linux_futex = yes])