Fix MfciDxe Debug error print missing new line character (microsoft#97)

## Description

* Add missing new line character to the end of a Debug print in MfciDxe.
* This improves readability of debug logs.

- [ ] Breaking change?
No breaking change.
- Will this change break pre-existing builds or functionality without
action being taken?

## How This Was Tested

* Verified log output is now properly formatted.

## Integration Instructions

N/A

MfciPkg/MfciDxe/MfciDxe.c

@@ -652,7 +652,7 @@ ValidateBlobWithXdrCertificates (
     if ((PublicKeyData + ALIGN_VALUE (PublicKeyDataLength, 4)) > PublicKeyDataXdrEnd) {
       DEBUG ((
         DEBUG_ERROR,
-        "%a - PcdMfciPkcs7CertBufferXdr size incorrect: PublicKeyData(0x%x) PublicKeyDataLength(0x%x) PublicKeyDataXdrEnd(0x%x)",
+        "%a - PcdMfciPkcs7CertBufferXdr size incorrect: PublicKeyData(0x%x) PublicKeyDataLength(0x%x) PublicKeyDataXdrEnd(0x%x)\n",
         __FUNCTION__,
         PublicKeyData,
         PublicKeyDataLength,