Modify AutoGen.h for libraries when using FixedAtBuild PCD.
Signed-off-by: Feng, Bob C <bob.c.feng@intel.com>
Reviewed-by: Liu Jiang A<jiang.a.liu@intel.com>
Reviewed-by: Yingke Liu <yingke.d.liu@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2-buildtools/code/trunk/BaseTools@2635 c2973edb-eda0-4c78-bc6a-9341b269661f
Rollback to revision 2634.

git-svn-id: https://svn.code.sf.net/p/edk2-buildtools/code/trunk/BaseTools@2636 c2973edb-eda0-4c78-bc6a-9341b269661f