sysutils/intel-pcm: update to 2.11.1

• move to official github project
• update comment to changes in project focus
• add license file
• drop use of compiler:c1++11-lib, no longer needed
• remove patch for pci.cpp, no longer needed
• update pkg-descr with text from new website

PR: 215897
Approved by: imp (maintainer, timeout: 16 days)