OvmfPkg/EnrollDefaultKeys: clean up minor whitespace wart

In edk2, we should spell "#pragma pack(...)" with a space character in
front of the opening parenthesis. Fix up locations that suggest otherwise.

Cc: Anthony Perard <anthony.perard@citrix.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Julien Grall <julien.grall@arm.com>
Bugzilla: https://bugzilla.tianocore.org/show_bug.cgi?id=1747
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Philippe Mathieu-Daude <philmd@redhat.com>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Gary Lin <glin@suse.com>

OvmfPkg/EnrollDefaultKeys/EnrollDefaultKeys.c

@@ -601,7 +601,7 @@ STATIC CONST EFI_GUID mMicrosoftOwnerGuid = {
 // UEFI specification, we'll introduce two matching convenience structures that
 // are customized for our X.509 purposes.
 //
-#pragma pack(1)
+#pragma pack (1)
 typedef struct {
   EFI_TIME TimeStamp;
 
@@ -632,7 +632,7 @@ typedef struct {
   // X.509 certificate follows
   //
 } REPEATING_HEADER;
-#pragma pack()
+#pragma pack ()
 
 /**
   Enroll a set of certificates in a global variable, overwriting it.