recipe: anchor regexps in COMPATIBLE_MACHINE

* bitbake is using re.match, so raspberrypi actually matches with anything
  ^raspberrypi.* which currently works, but it will also match with hypothetical
  raspberrypi-is-no-more-this-is-banana-now MACHINE which isn't intended by
  this COMPATIBLE_MACHINE.

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

recipes-devtools/bcm2835/bcm2835_1.52.bb

@@ -8,7 +8,7 @@ AUTHOR = "Mike McCauley (mikem@open.com.au)"
 LICENSE = "GPLv2"
 LIC_FILES_CHKSUM = "file://COPYING;md5=b234ee4d69f5fce4486a80fdaf4a4263"
 
-COMPATIBLE_MACHINE = "raspberrypi"
+COMPATIBLE_MACHINE = "^rpi$"
 
 SRC_URI = "http://www.airspayce.com/mikem/bcm2835/bcm2835-${PV}.tar.gz"
 

recipes-devtools/pi-blaster/pi-blaster.inc

@@ -16,6 +16,6 @@ INITSCRIPT_PACKAGES = "${PN}"
 INITSCRIPT_NAME_${PN} = "${PN}.boot.sh"
 INITSCRIPT_PARAMS_${PN} = "defaults 15 85"
 
-COMPATIBLE_MACHINE = "raspberrypi"
+COMPATIBLE_MACHINE = "^rpi$"
 
 PACKAGE_ARCH = "${MACHINE_ARCH}"

recipes-devtools/python/rpi-gpio_0.6.2.bb

@@ -17,5 +17,5 @@ S = "${WORKDIR}/${SRCNAME}-${PV}"
 
 inherit distutils
 
-COMPATIBLE_MACHINE = "raspberrypi"
+COMPATIBLE_MACHINE = "^rpi$"
 

recipes-devtools/python/rpio_0.10.0.bb

@@ -14,7 +14,7 @@ S = "${WORKDIR}/${SRCNAME}-${PV}"
 
 inherit setuptools
 
-COMPATIBLE_MACHINE = "raspberrypi"
+COMPATIBLE_MACHINE = "^rpi$"
 
 RDEPENDS_${PN} = "\
     python-logging \

recipes-devtools/wiringPi/wiringpi_git.bb

@@ -13,7 +13,7 @@ SRC_URI = "git://git.drogon.net/wiringPi \
            file://0001-Add-initial-cross-compile-support.patch \
            "
 
-COMPATIBLE_MACHINE = "raspberrypi"
+COMPATIBLE_MACHINE = "^rpi$"
 
 CFLAGS_prepend = "-I${S}/wiringPi -I${S}/devLib "