Fix issues with git formatted patches.

[mtyson01]

In a patch file that has a message or some other text prior to
the commit data, PatchReader will treat any lines that start with
whitespace as actual patch data, causing mangled output.

Also the '-- ' that git places at the end of the patch data will
be parsed as patch data and included in the raw output.

[mtyson01]

The problem was noticed with this patch:

https://bugzilla.redhat.com/attachment.cgi?id=463663

The mangled output looks like this:

@@ -, +, @@ 
 Signed-off-by: W. Michael Petullo <mike@flyn.org>
---
 new-kernel-pkg |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
--- a/new-kernel-pkg    
+++ a/new-kernel-pkg    
@@ -89,8 +89,8 @@ moddep=""
 verbose=""
 makedefault=""
 package=""
-mbkernel=""
-mbargs=""
+mbkernel="$HYPERVISOR"
+mbargs="$HYPERVISOR_ARGS"
 adddracutargs=""
 addplymouthinitrd=""

--