recipes: Convert licenses to SPDX expressions

- Automatically convert all licenses to valid SPDX license expressions
  using convert-spdx-licenses.py

Signed-off-by: Khem Raj <khem.raj@oss.qualcomm.com>

meta-webserver/recipes-php/xdebug/xdebug_3.5.3.bb

@@ -1,6 +1,6 @@
 SUMMARY = "Debugging and profiling extension for PHP"
 HOMEPAGE = "https://xdebug.org/"
-LICENSE = "Xdebug"
+LICENSE = "LicenseRef-Xdebug"
 LIC_FILES_CHKSUM = "file://LICENSE;md5=afd6ce4aa04fdc346e5b3c6e634bd75c"
 
 DEPENDS = "php re2c-native"