Give ELF notes 4-byte alignment.

Use .balign because what the argument means doesn't vary between
architectures.

Bug: http://b/70166421
Test: builds
Change-Id: I1d54f2f6942dd2893f3fda30bac08d07ea9cd346
diff --git a/libc/arch-common/bionic/crtbrand.S b/libc/arch-common/bionic/crtbrand.S
index 11bbfbe..4b4f99c 100644
--- a/libc/arch-common/bionic/crtbrand.S
+++ b/libc/arch-common/bionic/crtbrand.S
@@ -26,14 +26,14 @@
  * SUCH DAMAGE.
  */
 
-	.section	.note.android.ident,"a",%note
-	.align	2
-	.type	abitag, %object
+  .section .note.android.ident,"a",%note
+  .balign 4
+  .type abitag, %object
 abitag:
-	.long	2f-1f			/* int32_t namesz */
-	.long	3f-2f			/* int32_t descsz */
-	.long	1			/* int32_t type */
-1:	.ascii	"Android\0"		/* char name[] */
-2:	.long	PLATFORM_SDK_VERSION	/* int32_t android_api */
+  .long 2f-1f                 // int32_t namesz
+  .long 3f-2f                 // int32_t descsz
+  .long 1                     // int32_t type
+1:.ascii "Android\0"          // char name[]
+2:.long PLATFORM_SDK_VERSION  // int32_t android_api
 3:
-	.size	abitag, .-abitag
+  .size abitag, .-abitag