Add Makefile to gitignore

Calling cmake replaces this file, so no need to commit it.

Change-Id: Ic4747cc9eebd9cbfc61d524a31d2025c04eda12e
Signed-off-by: Jeremy Newton <Jeremy.Newton@amd.com>


[ROCm/ROCR-Runtime commit: 3b64517787]

projects/rocr-runtime/.gitignore

@@ -8,3 +8,4 @@
 patches-*
 build/
 outgoing/
+Makefile

projects/rocr-runtime/Makefile

@@ -1,18 +0,0 @@
-.PHONY: all clean lnx64a lnx
-
-all: lnx64a
-
-deb:
-	$(MAKE) -C src deb
-
-rpm:
-	$(MAKE) -C src rpm
-
-lnx64a:
-	$(MAKE) -C src lnx64a
-
-lnx:
-	$(MAKE) -C src lnx
-
-clean:
-	$(MAKE) -C src clean