Update CHANGELOG to note impending EOL of PHP 5.4
Update CHANGELOG to note impending EOL of PHP 5.4

[#102939914]

ashish17das/cf-php-build,aronreid/cf-php-buildpack,arjankroontolsma/post2,zizhongwei/php-buildpack-master,arjankroontolsma/post2,cloudfoundry/php-buildpack,ArthurHlt/php-buildpack,LeonidLe/php-buildpack,chregu/cf-php-varnish-buildpack,ashish17das/cf-php-build,tgemal00/php-buildpack,lloydbadger/test,svrc-pivotal/php-buildpack,svrc-pivotal/php-buildpack,arjankroontolsma/post2,chregu/cf-php-varnish-buildpack,cf-identity/php-buildpack,nkatre/php-buildpack,ArthurHlt/php-buildpack,cf-identity/php-buildpack,tgemal00/php-buildpack,jan-randis/php-db2-mysql-buildpack,ashish17das/cf-php-build,cloudfoundry/php-buildpack,arjankroontolsma/post2,ArthurHlt/php-buildpack,LeonidLe/php-buildpack,cloudfoundry/php-buildpack,Orange-OpenSource/cf-php-build-pack,nkatre/php-buildpack,chregu/cf-php-varnish-buildpack,aronreid/cf-php-buildpack,LeonidLe/php-buildpack,lloydbadger/test,ArthurHlt/php-buildpack,nkatre/php-buildpack,zizhongwei/php-buildpack-master,ArthurHlt/php-buildpack,hpcloud/php-buildpack,zizhongwei/php-buildpack-master,aronreid/cf-php-buildpack,chregu/cf-php-varnish-buildpack,zhangyanfa/yanfaz-php-buildpack,chregu/cf-php-varnish-buildpack,cloudfoundry/php-buildpack,cloudfoundry/php-buildpack,LeonidLe/php-buildpack,zhangyanfa/yanfaz-php-buildpack,arjankroontolsma/post2,zizhongwei/php-buildpack-master,tgemal00/php-buildpack,cloudfoundry/php-buildpack,cf-identity/php-buildpack,arjankroontolsma/post2,svrc-pivotal/php-buildpack,svrc-pivotal/php-buildpack,Orange-OpenSource/cf-php-build-pack,ashish17das/cf-php-build,hpcloud/php-buildpack,ashish17das/cf-php-build,jan-randis/php-db2-mysql-buildpack,lloydbadger/test,cloudfoundry/php-buildpack,Orange-OpenSource/cf-php-build-pack,cf-identity/php-buildpack,jan-randis/php-db2-mysql-buildpack,zhangyanfa/yanfaz-php-buildpack,chregu/cf-php-varnish-buildpack,jan-randis/php-db2-mysql-buildpack,hpcloud/php-buildpack,aronreid/cf-php-buildpack,lloydbadger/test,svrc-pivotal/php-buildpack,hpcloud/php-buildpack,zizhongwei/php-buildpack-master,zhangyanfa/yanfaz-php-buildpack,zizhongwei/php-buildpack-master,lloydbadger/test,cf-identity/php-buildpack,zhangyanfa/yanfaz-php-buildpack,nkatre/php-buildpack,tgemal00/php-buildpack,tgemal00/php-buildpack,hpcloud/php-buildpack,LeonidLe/php-buildpack,tgemal00/php-buildpack,cf-identity/php-buildpack,svrc-pivotal/php-buildpack,ashish17das/cf-php-build,LeonidLe/php-buildpack,aronreid/cf-php-buildpack,jan-randis/php-db2-mysql-buildpack,hpcloud/php-buildpack,aronreid/cf-php-buildpack,ArthurHlt/php-buildpack,nkatre/php-buildpack,jan-randis/php-db2-mysql-buildpack,nkatre/php-buildpack,cf-identity/php-buildpack,lloydbadger/test,zhangyanfa/yanfaz-php-buildpack