u-boot: Rename recipe to u-boot-fslc

Rename u-boot to u-boot-fslc as we find it better to show that this
recipe builds u-boot + freescale's community patches and not a
mainline u-boot.

 fslc - Freescale community.

Signed-off-by: Andrei Gherzan <andrei.gherzan@windriver.com>

diff --git a/meta-fsl-arm/recipes-bsp/u-boot/u-boot_2012.10.bb b/meta-fsl-arm/recipes-bsp/u-boot/u-boot-fslc_2012.10.bb
similarity index 100%
rename from meta-fsl-arm/recipes-bsp/u-boot/u-boot_2012.10.bb
rename to meta-fsl-arm/recipes-bsp/u-boot/u-boot-fslc_2012.10.bb