[sw] Move tests/sanity_timer to tests/rv_timer

We'll add add more tests under rv_timer over time.
diff --git a/sw/tests/sanity_timer/Makefile b/sw/tests/rv_timer/Makefile
similarity index 86%
rename from sw/tests/sanity_timer/Makefile
rename to sw/tests/rv_timer/Makefile
index a7a68ec..22e926c 100644
--- a/sw/tests/sanity_timer/Makefile
+++ b/sw/tests/rv_timer/Makefile
@@ -4,8 +4,8 @@
 #
 # Generate a baremetal application for the microcontroller
 
-NAME         = sanity_timer
-SRCS         = sanity_timer.c
+NAME         = rv_timer_test
+SRCS         = rv_timer_test.c
 PROGRAM_DIR := $(shell dirname $(realpath $(lastword $(MAKEFILE_LIST))))
 
 include ${PROGRAM_DIR}/../../exts/common/options.mk
diff --git a/sw/tests/sanity_timer/sanity_timer.c b/sw/tests/rv_timer/rv_timer_test.c
similarity index 95%
rename from sw/tests/sanity_timer/sanity_timer.c
rename to sw/tests/rv_timer/rv_timer_test.c
index 34c7027..9f43871 100644
--- a/sw/tests/sanity_timer/sanity_timer.c
+++ b/sw/tests/rv_timer/rv_timer_test.c
@@ -31,7 +31,7 @@
     }
   }
 
-  uart_send_str("PASS!\n");
+  uart_send_str("PASS!\r\n");
   __asm__ volatile("wfi;");
 }