BaseTools:Build fail if define [DEPEX] in library inf

BaseTools:Build fail if define [DEPEX] in library inf

When define [DEPEX] in lib inf to build, it will fail and report"
gUefiOvmfPkgTokenSpaceGuid.test1 used in [Depex] section should be
used as FixedAtBuild type and VOID* datum type in the module."
But we define this PCD to FixedAtBuild type and VOID* datum type indeed.

DEC:
[PcdsFixedAtBuild]
gUefiOvmfPkgTokenSpaceGuid.test1 |
{GUID("4096267b-da0a-42eb-b5eb-fef31d207cb4")}|VOID*|0x3c

DSC:
add pcd under lib inf as below:

NULL|TestPkg/TestLib/TestLib.inf
 <PcdsFixedAtBuild>
    gUefiOvmfPkgTokenSpaceGuid.test1 | {GUID(gUefiOvmfPkgTokenSpaceGuid)}

Lib inf:(TestPkg/TestLib/TestLib.inf)
[Depex]
gUefiOvmfPkgTokenSpaceGuid.test1
[FixedPcd]
gUefiOvmfPkgTokenSpaceGuid.test1

Cc: Bob Feng <bob.c.feng@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Zhiju.Fan <zhijux.fan@intel.com>
Reviewed-by: Bob Feng <bob.c.feng@intel.com>