rules: rename file only.

Trivial rename, allow vim to properly detect the file as a makefile.

README.md

@@ -137,7 +137,7 @@ repository)
 These urls grab the latest from the libopencm3-examples repository
 
        wget \
-         https://raw.githubusercontent.com/libopencm3/libopencm3-examples/master/examples/Makefile.rules \
+         https://raw.githubusercontent.com/libopencm3/libopencm3-examples/master/examples/rules.mk \
          -O libopencm3.rules.mk
 
 4. Grab a copy of your target Makefile in this case, for STM32L1

examples/lpc/lpc13xx/Makefile.include

@@ -41,4 +41,4 @@ BMP_PORT	?=
 #STLINK_PORT	?= :4242
 
 
-include ../../../../Makefile.rules
+include ../../../../rules.mk

examples/lpc/lpc17xx/Makefile.include

@@ -42,4 +42,4 @@ BMP_PORT	?=
 #STLINK_PORT	?= :4242
 
 
-include ../../../../Makefile.rules
+include ../../../../rules.mk

examples/lpc/lpc43xx/Makefile.include

@@ -44,4 +44,4 @@ BMP_PORT	?=
 #STLINK_PORT	?= :4242
 
 
-include ../../../../Makefile.rules
+include ../../../../rules.mk

examples/sam/d/Makefile.include

@@ -30,4 +30,4 @@ OOCD		?= openocd
 OOCD_INTERFACE	?= cmsis-dap
 OOCD_BOARD	?= 
 
-include ../../../../Makefile.rules
+include ../../../../rules.mk

examples/stm32/f0/Makefile.include

@@ -41,4 +41,4 @@ BMP_PORT	?=
 #STLINK_PORT	?= :4242
 
 
-include ../../../../Makefile.rules
+include ../../../../rules.mk

examples/stm32/f1/Makefile.include

@@ -41,4 +41,4 @@ BMP_PORT	?=
 #STLINK_PORT	?= :4242
 
 
-include ../../../../Makefile.rules
+include ../../../../rules.mk

examples/stm32/f2/Makefile.include

@@ -43,4 +43,4 @@ BMP_PORT	?=
 #STLINK_PORT	?= :4242
 
 
-include ../../../../Makefile.rules
+include ../../../../rules.mk

examples/stm32/f3/Makefile.include

@@ -42,4 +42,4 @@ BMP_PORT	?=
 #STLINK_PORT	?= :4242
 
 
-include ../../../../Makefile.rules
+include ../../../../rules.mk

examples/stm32/f4/Makefile.include

@@ -45,7 +45,4 @@ BMP_PORT	?=
 #STLINK_PORT	?= :4242
 
 
-include ../../../../Makefile.rules
+include ../../../../rules.mk
-
-
-

examples/stm32/l0/Makefile.include

@@ -41,4 +41,4 @@ BMP_PORT	?=
 #STLINK_PORT	?= :4242
 
 
-include ../../../../Makefile.rules
+include ../../../../rules.mk

examples/stm32/l1/Makefile.include

@@ -41,4 +41,4 @@ BMP_PORT	?=
 #STLINK_PORT	?= :4242
 
 
-include ../../../../Makefile.rules
+include ../../../../rules.mk

examples/tiva/lm3s/Makefile.include

@@ -41,4 +41,4 @@ BMP_PORT	?=
 #STLINK_PORT	?= :4242
 
 
-include ../../../../Makefile.rules
+include ../../../../rules.mk

examples/tiva/lm4f/Makefile.include

@@ -44,4 +44,4 @@ BMP_PORT	?=
 #STLINK_PORT	?= :4242
 
 
-include ../../../../Makefile.rules
+include ../../../../rules.mk

examples/vf6xx/colibri-vf61/Makefile.include

@@ -26,7 +26,4 @@ DEFS		+= -DVF6XX
 FP_FLAGS	?= -mfloat-abi=hard -mfpu=fpv4-sp-d16
 ARCH_FLAGS	= -mthumb -mcpu=cortex-m4 $(FP_FLAGS)
 
-include ../../../Makefile.rules
+include ../../../rules.mk
-
-
-