ShellPkg-UefiShellCommandLib: Add EFIAPI in VA_List library function

Add EFIAPI in CatPrint library function. Every function which uses
variable list need explicit use EFIAPI to force use MS ABI. This change
is needed to pass CLANG38 build.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Steven Shi <steven.shi@intel.com>
Reviewed-by: Jaben Carsey <jaben.carsey@intel.com>
diff --git a/ShellPkg/Library/UefiShellCommandLib/ConsistMapping.c b/ShellPkg/Library/UefiShellCommandLib/ConsistMapping.c
old mode 100644
new mode 100755
index d157ebb..979693a
--- a/ShellPkg/Library/UefiShellCommandLib/ConsistMapping.c
+++ b/ShellPkg/Library/UefiShellCommandLib/ConsistMapping.c
@@ -85,6 +85,7 @@
 

 **/

 EFI_STATUS

+EFIAPI

 CatPrint (

   IN OUT POOL_PRINT   *Str,

   IN CHAR16           *Fmt,