BaseTools: Update GenFw to support 4K alignment.

Get maximum section alignment from each ELF section, and this alignment is used to create PE header.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Liming Gao <liming.gao@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17727 6f19259b-4bc3-4df7-8a09-765794883524

BaseTools/Source/C/GenFw/ElfConvert.c

@@ -96,11 +96,11 @@ CoffAddFixup(
 
     mCoffFile = realloc (
       mCoffFile,
-      mCoffOffset + sizeof(EFI_IMAGE_BASE_RELOCATION) + 2*0x1000
+      mCoffOffset + sizeof(EFI_IMAGE_BASE_RELOCATION) + 2 * MAX_COFF_ALIGNMENT
       );
     memset (
       mCoffFile + mCoffOffset, 0,
-      sizeof(EFI_IMAGE_BASE_RELOCATION) + 2*0x1000
+      sizeof(EFI_IMAGE_BASE_RELOCATION) + 2 * MAX_COFF_ALIGNMENT
       );
 
     mCoffBaseRel = (EFI_IMAGE_BASE_RELOCATION*)(mCoffFile + mCoffOffset);