ArmPkg: list module-internal header files in INF [Sources]

The BaseTools build feature introduced for TianoCore#1804 / in commit
1fa6699e6c ("BaseTools: Add a checking for Sources section in INF file",
2019-06-10) logs some (non-fatal) warnings about unlisted internal header
files. List those files explicitly.

Note: header files are added in lexicographical order only if the
underlying INF file already keeps the [Sources] and [LibraryClasses]
sections in lexicographical order. Otherwise, header files are added in
rough "logical" order.

Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Leif Lindholm <leif.lindholm@linaro.org>
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>

ArmPkg/Drivers/ArmGic/ArmGicDxe.inf

@@ -17,6 +17,7 @@
   ENTRY_POINT                    = InterruptDxeInitialize
 
 [Sources.common]
+  ArmGicDxe.h
   ArmGicDxe.c
   ArmGicCommonDxe.c
 

ArmPkg/Library/ArmLib/ArmBaseLib.inf

@@ -18,9 +18,11 @@
   LIBRARY_CLASS                  = ArmLib
 
 [Sources]
+  ArmLibPrivate.h
   ArmLib.c
 
 [Sources.ARM]
+  Arm/ArmV7Lib.h
   Arm/ArmV7Lib.c
 
   Arm/ArmLibSupport.S           | GCC
@@ -34,6 +36,7 @@
   Arm/ArmV7ArchTimerSupport.asm | RVCT
 
 [Sources.AARCH64]
+  AArch64/AArch64Lib.h
   AArch64/AArch64Lib.c
 
   AArch64/ArmLibSupport.S

ArmPkg/Library/PlatformBootManagerLib/PlatformBootManagerLib.inf

@@ -26,6 +26,7 @@
 
 [Sources]
   PlatformBm.c
+  PlatformBm.h
 
 [Packages]
   EmbeddedPkg/EmbeddedPkg.dec