[llvm-Object] Added public MaxSectionAlignment to MachOUniversal

[anushabasana]

Summary

Changed MAXSECTALIGN to a public MaxSectionAlignment in MachOUniversal

Test Plan:

llvm/trunk/include/llvm/Object/MachOUniversal.h

 namespace object {
 
 class MachOUniversalBinary : public Binary {
   virtual void anchor();
 
   uint32_t Magic;
   uint32_t NumberOfObjects;
 public:
+  static constexpr uint32_t MaxSectionAlignment = 15; /* 2**15 or 0x8000 */
+
   class ObjectForArch {
     const MachOUniversalBinary *Parent;
     /// Index of object in the universal binary.
     uint32_t Index;
     /// Descriptor of the object.
     MachO::fat_arch Header;
     MachO::fat_arch_64 Header64;
 

llvm/trunk/lib/Object/MachOUniversal.cpp

for (uint32_t i = 0; i < NumberOfObjects; i++) {
     bigSize += A.getSize();
     if (bigSize > Buf.size()) {
       Err = malformedError("offset plus size of cputype (" +
         Twine(A.getCPUType()) + ") cpusubtype (" +
         Twine(A.getCPUSubType() & ~MachO::CPU_SUBTYPE_MASK) +
         ") extends past the end of the file");
       return;
     }
-#define MAXSECTALIGN 15 /* 2**15 or 0x8000 */
-    if (A.getAlign() > MAXSECTALIGN) {
-      Err = malformedError("align (2^" + Twine(A.getAlign()) + ") too large "
-        "for cputype (" + Twine(A.getCPUType()) + ") cpusubtype (" +
+
+    if (A.getAlign() > MaxSectionAlignment) {
+      Err = malformedError("align (2^" + Twine(A.getAlign()) +
+                           ") too large for cputype (" + Twine(A.getCPUType()) +
+                           ") cpusubtype (" +
                            Twine(A.getCPUSubType() & ~MachO::CPU_SUBTYPE_MASK) +
-        ") (maximum 2^" + Twine(MAXSECTALIGN) + ")");
+                           ") (maximum 2^" + Twine(MaxSectionAlignment) + ")");
       return;
     }
     if(A.getOffset() % (1 << A.getAlign()) != 0){
       Err = malformedError("offset: " + Twine(A.getOffset()) +
         " for cputype (" + Twine(A.getCPUType()) + ") cpusubtype (" +
         Twine(A.getCPUSubType() & ~MachO::CPU_SUBTYPE_MASK) +
         ") not aligned on it's alignment (2^" + Twine(A.getAlign()) + ")");
       return;