OVMF X64: Allow enabling SOURCE_DEBUG_ENABLE on GCC44

Currently if SOURCE_DEBUG_ENABLE is enabled when building with
GCC44, then the SEC module will not fit into SECFV.

This change increases the size of SECFV to allow this.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13687 6f19259b-4bc3-4df7-8a09-765794883524
MU SOURCE COMMIT:82045b2f7ac0ec0270fd58fe30f101dd628a59ae

Platforms/OvmfPkg/OvmfPkgX64.fdf

@@ -21,10 +21,10 @@ ErasePolarity = 1
 BlockSize     = 0x1000
 NumBlocks     = 0x100
 
-0x00000000|0x000EC000
+0x00000000|0x000E6000
 FV = FVMAIN_COMPACT
 
-0x000EC000|0x14000
+0x000E6000|0x1A000
 FV = SECFV
 
 ################################################################################