php7-pecl-dio: update SPDX id to most recent format

Also the source package contains a LICENSE file, so
we can refer to it.

Signed-off-by: Michael Heimpold <mhei@heimpold.de>

lang/php7-pecl-dio/Makefile

@@ -9,7 +9,7 @@ PECL_NAME:=dio
 PECL_LONGNAME:=Direct I/O functions
 
 PKG_VERSION:=0.1.0
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 PKG_HASH:=aab985e374604379d99c9c93207f2c2959ff141740d1a648c0fbd07e0e08a73e
 
 PKG_NAME:=php7-pecl-$(PECL_NAME)
@@ -21,8 +21,8 @@ PKG_BUILD_PARALLEL:=1
 
 PKG_MAINTAINER:=Michael Heimpold <mhei@heimpold.de>
 
-PKG_LICENSE:=PHPv3.01
-PKG_LICENSE_FILES:=
+PKG_LICENSE:=PHP-3.01
+PKG_LICENSE_FILES:=LICENSE
 
 PKG_FIXUP:=autoreconf