localversion-rt: Change a file name to _localversion-rt

Change a file name from localversion-rt to _localversion-rt.
It needs to build both non-rt and rt kernels.

Change-Id: I32070b16251ba64743d01bc145291e59fa0a0153
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>

diff --git a/_localversion-rt b/_localversion-rt
new file mode 100644 (file)
index 0000000..c29508d
--- /dev/null
+++ b/_localversion-rt
@@ -0,0 +1 @@
+-rt22