Revert "x11-misc/rss-glx: Do not install static libraries"

Revert "x11-misc/rss-glx: Do not install static libraries"

With --disable-static, matrixview surprisingly fails:
libGL error: No matching fbConfigs or visuals found
libGL error: failed to load driver: swrast
X Error of failed request:  BadValue (integer parameter out of range for
operation)
  Major opcode of failed request:  150 (GLX)
  Minor opcode of failed request:  3 (X_GLXCreateContext)
  Value in failed request:  0x0
  Serial number of failed request:  114
  Current serial number in output stream:  115

This reverts commit 57ba9eb2ff8dbe8fddf90cb326a84f38826d189c.

Signed-off-by: Jeroen Roovers <jer@gentoo.org>