add explicit alignment directives to assure arm code is 4-byte aligned

llvm-svn: 102030
diff --git a/compiler-rt/lib/arm/fixdfsivfp.S b/compiler-rt/lib/arm/fixdfsivfp.S
index 70d8027..30458cc 100644
--- a/compiler-rt/lib/arm/fixdfsivfp.S
+++ b/compiler-rt/lib/arm/fixdfsivfp.S
@@ -16,6 +16,7 @@
 // Uses Darwin calling convention where a double precision parameter is 
 // passed in GPR register pair.
 //
+	.align 2
 DEFINE_COMPILERRT_FUNCTION(__fixdfsivfp)
 	fmdrr	d7, r0, r1    // load double register from R0/R1
 	ftosizd	s15, d7       // convert double to 32-bit int into s15