Install header for libsatsolverext
Install header for libsatsolverext

Typo in CMakeLists.txt, the variable was used in ext/ and src/

JacksonIsaac/libsolv,jsilhan/libsolv,JacksonIsaac/libsolv,JacksonIsaac/libsolv,jsilhan/libsolv,jsilhan/libsolv,JacksonIsaac/libsolv,JacksonIsaac/libsolv,jsilhan/libsolv,jsilhan/libsolv,jsilhan/libsolv