tcl: add a tclsh symlink

tclsh is installed with its version number (tclshx.y) but scripts (like
usb_modeswitch_dispatcher) are calling tclsh, not tclshx.y.

Signed-off-by: Richard Genoud <richard.genoud@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/tcl/tcl.mk

@@ -35,6 +35,11 @@ define TCL_REMOVE_TCLSH
 	rm -f $(TARGET_DIR)/usr/bin/tclsh$(TCL_VERSION_MAJOR)
 endef
 TCL_POST_INSTALL_TARGET_HOOKS += TCL_REMOVE_TCLSH
+else
+define TCL_SYMLINK_TCLSH
+	ln -s tclsh$(TCL_VERSION_MAJOR) $(TARGET_DIR)/usr/bin/tclsh
+endef
+TCL_POST_INSTALL_TARGET_HOOKS += TCL_SYMLINK_TCLSH
 endif
 
 $(eval $(autotools-package))