package.mask: dev-php/PEAR-* Last rites

package.mask: dev-php/PEAR-* Last rites

- Brian Evans <grknight@gentoo.org (15 Feb 2018)
- These PEAR packages are unmaintained upstream and
- are difficult to test or have no tests.
- PHP team no longer wants to maintain these for PHP7 and beyond
- Removal in 30 days - Bug 647768
dev-php/PEAR-Benchmark
dev-php/PEAR-Calendar
dev-php/PEAR-Console_Color
dev-php/PEAR-Crypt_Blowfish
dev-php/PEAR-Crypt_RC4
dev-php/PEAR-XML_Beautifier
dev-php/PEAR-XML_Feed_Parser
dev-php/PEAR-Structures_DataGrid
dev-php/PEAR-PHP_CompatInfo
dev-php/PEAR-Net_Server
dev-php/PEAR-Net_LMTP
dev-php/PEAR-Net_IMAP
dev-php/PEAR-Net_FTP
dev-php/PEAR-Net_DIME
dev-php/PEAR-Math_Stats