common-licenses: Additions and corrections

I've added more licenses from SPDX and corrected the gcc license
so that it is a. parsable and b. accurate to the SPDX standard.

I've also done some cleanup of license text and gdb's LICENSE
field.

(From OE-Core rev: e47343d12ee571281238bbf5663b074c0e32049f)

Signed-off-by: Beth Flanagan <elizabeth.flanagan@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/gcc/gcc-4.5.1.inc

@@ -3,7 +3,7 @@ require gcc-common.inc
 DEPENDS =+ "mpfr gmp libmpc elfutils"
 NATIVEDEPS = "mpfr-native gmp-native gettext-native libmpc-native elfutils-native"
 
-LICENSE="GCC RUNTIME LIBRARY EXCEPTION & GPLv2 & GPLv3 & LGPLv2.1 & LGPLv3"
+LICENSE="GPL-3.0-with-GCC-exception & GPLv2 & GPLv3 & LGPLv2.1 & LGPLv3"
 
 LIC_FILES_CHKSUM = "file://COPYING;md5=59530bdf33659b29e73d4adb9f9f6552 \
                    file://COPYING3;md5=d32239bcb673463ab874e80d47fae504 \

meta/recipes-devtools/gcc/gcc-4.6.inc

@@ -25,7 +25,7 @@ FILESPATH = "${@base_set_filespath([ '${FILE_DIRNAME}/gcc-4.6' ], d)}"
 DEPENDS =+ "mpfr gmp libmpc"
 NATIVEDEPS = "mpfr-native gmp-native gettext-native libmpc-native"
 
-LICENSE="GCC RUNTIME LIBRARY EXCEPTION & GPLv3"
+LICENSE="GPL-3.0-with-GCC-exception & GPLv3"
 
 LIC_FILES_CHKSUM = "file://COPYING;md5=59530bdf33659b29e73d4adb9f9f6552 \
                    file://COPYING3;md5=d32239bcb673463ab874e80d47fae504 \

meta/recipes-devtools/gdb/gdb_7.2.bb

@@ -1,5 +1,5 @@
 require gdb.inc
-LICENSE="GPLv2&GPLv3&LGPLv2&LGPLv3"
+LICENSE="GPLv2 & GPLv3 & LGPLv2 & LGPLv3"
 LIC_FILES_CHKSUM = "file://COPYING;md5=59530bdf33659b29e73d4adb9f9f6552 \
 		    file://COPYING3;md5=d32239bcb673463ab874e80d47fae504 \
 		    file://COPYING3.LIB;md5=6a6a8e020838b23406c81b19c1d46df6 \