Fix issues with Arm's use of embedded constant pools

src/ppc/assembler-ppc.h

Index: src/ppc/assembler-ppc.h
diff --git a/src/ppc/assembler-ppc.h b/src/ppc/assembler-ppc.h
index fb56852bb5b5c254d82662f910f0b1c5265f90dc..e8a654fe6457022332381d5de2d48e66c076f866 100644
--- a/src/ppc/assembler-ppc.h
+++ b/src/ppc/assembler-ppc.h
@@ -736,6 +736,9 @@ class Assembler : public AssemblerBase {
   // possible to align the pc offset to a multiple
   // of m. m must be a power of 2 (>= 4).
   void Align(int m);
+  // Insert the smallest number of zero bytes possible to align the pc offset
+  // to a mulitple of m. m must be a power of 2 (>= 2).
+  void DataAlign(int m);
   // Aligns code to something that's optimal for a jump target for the platform.
   void CodeTargetAlign();