Add nginx 1.11.7, remove nginx 1.11.6
Add nginx 1.11.7, remove nginx 1.11.6

source url: http://nginx.org/download/nginx-1.11.7.tar.gz, source gpg-signature:
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[#136041771]

tgemal00/php-buildpack,cloudfoundry/php-buildpack,nkatre/php-buildpack,nkatre/php-buildpack,cf-identity/php-buildpack,cf-identity/php-buildpack,nkatre/php-buildpack,cloudfoundry/php-buildpack,tgemal00/php-buildpack,jan-randis/php-db2-mysql-buildpack,cf-identity/php-buildpack,nkatre/php-buildpack,cf-identity/php-buildpack,cloudfoundry/php-buildpack,jan-randis/php-db2-mysql-buildpack,tgemal00/php-buildpack,cloudfoundry/php-buildpack,cloudfoundry/php-buildpack,tgemal00/php-buildpack,cf-identity/php-buildpack,cloudfoundry/php-buildpack,jan-randis/php-db2-mysql-buildpack,Orange-OpenSource/cf-php-build-pack,tgemal00/php-buildpack,tgemal00/php-buildpack,cf-identity/php-buildpack,Orange-OpenSource/cf-php-build-pack,cloudfoundry/php-buildpack,jan-randis/php-db2-mysql-buildpack,nkatre/php-buildpack,jan-randis/php-db2-mysql-buildpack,cf-identity/php-buildpack,Orange-OpenSource/cf-php-build-pack,nkatre/php-buildpack,jan-randis/php-db2-mysql-buildpack