Fix installation of shared library symlink

This partially reverts 29391cc.

The dummy target that was removed in 29391cc
was responsible for installing the unversioned symlink for the shared libraries.
The only part of this that was causing issue appears to be the dummy destination
that was only added as an workaround for old cmake version (pre 3.14-ish).
With the cmake version requirement bumped to 3.18 this should not be an issue anymore.

This also fixes a typo from eb3d977 causing
the libsleefgnuabi library to be missing the symlink...

src/dft/CMakeLists.txt

@@ -423,3 +423,10 @@ install(
     INCLUDES #
     DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}"
 )
+install(
+    TARGETS ${TARGET_LIBDFT}
+    LIBRARY #
+    DESTINATION "${CMAKE_INSTALL_LIBDIR}"
+    COMPONENT sleef_Development
+    NAMELINK_ONLY
+)

src/libm/CMakeLists.txt

@@ -1004,6 +1004,14 @@ if(SLEEF_BUILD_SCALAR_LIB)
       DESTINATION "${CMAKE_INSTALL_BINDIR}"
       COMPONENT sleef_Runtime
   )
+
+  install(
+      TARGETS sleefscalar
+      LIBRARY #
+      DESTINATION "${CMAKE_INSTALL_LIBDIR}"
+      COMPONENT sleef_Development
+      NAMELINK_ONLY
+  )
 endif()
 
 # --------------------------------------------------------------------
@@ -1029,6 +1037,13 @@ install(
     INCLUDES #
     DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}"
 )
+install(
+    TARGETS ${TARGET_LIBSLEEF}
+    LIBRARY #
+    DESTINATION "${CMAKE_INSTALL_LIBDIR}"
+    COMPONENT sleef_Development
+    NAMELINK_ONLY
+)
 configure_file("sleef.pc.in" "${CMAKE_CURRENT_BINARY_DIR}/sleef.pc" @ONLY)
 install(
     FILES "${CMAKE_CURRENT_BINARY_DIR}/sleef.pc"
@@ -1051,4 +1066,11 @@ if(ENABLE_GNUABI)
       DESTINATION "${CMAKE_INSTALL_BINDIR}"
       COMPONENT sleef_Runtime
   )
+  install(
+      TARGETS ${TARGET_LIBSLEEFGNUABI}
+      LIBRARY #
+      DESTINATION "${CMAKE_INSTALL_LIBDIR}"
+      COMPONENT sleef_Development
+      NAMELINK_ONLY
+  )
 endif()

src/quad/CMakeLists.txt

@@ -502,3 +502,10 @@ install(
     INCLUDES #
     DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}"
 )
+install(
+    TARGETS sleefquad
+    LIBRARY #
+    DESTINATION "${CMAKE_INSTALL_LIBDIR}"
+    COMPONENT sleef_Development
+    NAMELINK_ONLY
+)