[PATCH] [MC] When using bundle aligment, align sections to bundle size

[Rafael Ávila de Espíndola]

LGTM with test update


================
Comment at: test/MC/X86/AlignedBundling/section-alignment.s:16
@@ +15,3 @@
+# CHECK-LABEL: Name: text1
+# CHECK: AddressAlignment: 32
+
----------------
CHECK-NOT in here too.

================
Comment at: test/MC/X86/AlignedBundling/section-alignment.s:20
@@ +19,3 @@
+  imull $17, %ebx, %ebp
+# CHECK-LABEL: Name: text2
+# CHECK: AddressAlignment: 32
----------------
and here

http://reviews.llvm.org/D9131

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