{devel,lang,lib}[GCC/4.9.3-2.25] SQLite v3.13.0, libreadline v6.3, Tcl v8.6.5

{lib}[GCC/4.9.3-2.25] Guile v2.0.11 (REVIEW)

add easyconfig SQLite-3.13.0-GCC-4.9.3-2.25.eb, add easyconfig libreadline-6.3-GCC-4.9.3-2.25.eb, add easyconfig Tcl-8.6.5-GCC-4.9.3-2.25.eb

use check_conflicts function in easyconfigs tests

also include vsc-install in list of sources, to support offline installation

add easyconfig Guile-2.0.11.eb, add easyconfig gc-7.4.4.eb, add easyconfig libffi-3.2.1.eb, add easyconfig libunistring-0.9.3.eb

add easyconfig file for Extrae

This reverts commit 9d0687e8.

This reverts commit be9fd860.

fix location of libelf.h, only (also) installed as include/libelf.h is there's no /usr/include/libelf.h

fix location of libelf.h, only (also) installed as include/libelf.h is there's no /usr/include/libelf.h

fix location of libelf.h, only (also) installed as include/libelf.h is there's no /usr/include/libelf.h

fix location of libelf.h, only (also) installed as include/libelf.h is there's no /usr/include/libelf.h