explicitly link halscope with libm
explicitly link halscope with libm

halscope calls hypot(), which is in libm.  Before this commit halscope
was linked against GTK_LIBS only, which on Ubuntu includes -lm.
But apparently on Fedora 13 it does not.  This commit makes halscope
explicitly link against libm.

bobvanderlinden/machinekit,ikcalB/linuxcnc-mirror,mhaberler/machinekit,unseenlaser/linuxcnc,RunningLight/machinekit,unseenlaser/machinekit,ArcEye/MK-Qt5,ArcEye/MK-Qt5,cdsteinkuehler/MachineKit,araisrobo/machinekit,araisrobo/machinekit,bmwiedemann/linuxcnc-mirror,ianmcmahon/linuxcnc-mirror,araisrobo/machinekit,strahlex/machinekit,aschiffler/linuxcnc,bobvanderlinden/machinekit,araisrobo/machinekit,mhaberler/machinekit,Cid427/machinekit,bobvanderlinden/machinekit,araisrobo/linuxcnc,jaguarcat79/ILC-with-LinuxCNC,ArcEye/MK-Qt5,unseenlaser/machinekit,araisrobo/machinekit,ikcalB/linuxcnc-mirror,jaguarcat79/ILC-with-LinuxCNC,unseenlaser/linuxcnc,aschiffler/linuxcnc,RunningLight/machinekit,ikcalB/linuxcnc-mirror,ArcEye/machinekit-testing,ikcalB/linuxcnc-mirror,cnc-club/linuxcnc,bobvanderlinden/machinekit,unseenlaser/machinekit,kinsamanka/machinekit,kinsamanka/machinekit,araisrobo/machinekit,aschiffler/linuxcnc,ianmcmahon/linuxcnc-mirror,RunningLight/machinekit,unseenlaser/linuxcnc,ArcEye/MK-Qt5,jaguarcat79/ILC-with-LinuxCNC,cdsteinkuehler/linuxcnc,jaguarcat79/ILC-with-LinuxCNC,EqAfrica/machinekit,Cid427/machinekit,bmwiedemann/linuxcnc-mirror,strahlex/machinekit,ArcEye/machinekit-testing,cnc-club/linuxcnc,kinsamanka/machinekit,cdsteinkuehler/linuxcnc,bobvanderlinden/machinekit,kinsamanka/machinekit,unseenlaser/machinekit,ArcEye/machinekit-testing,unseenlaser/machinekit,Cid427/machinekit,RunningLight/machinekit,bobvanderlinden/machinekit,ArcEye/MK-Qt5,cdsteinkuehler/MachineKit,cdsteinkuehler/MachineKit,unseenlaser/machinekit,mhaberler/machinekit,cdsteinkuehler/linuxcnc,Cid427/machinekit,RunningLight/machinekit,ArcEye/machinekit-testing,araisrobo/machinekit,ikcalB/linuxcnc-mirror,unseenlaser/linuxcnc,EqAfrica/machinekit,aschiffler/linuxcnc,EqAfrica/machinekit,kinsamanka/machinekit,mhaberler/machinekit,cnc-club/linuxcnc,narogon/linuxcnc,strahlex/machinekit,narogon/linuxcnc,unseenlaser/machinekit,mhaberler/machinekit,ikcalB/linuxcnc-mirror,cnc-club/linuxcnc,kinsamanka/machinekit,araisrobo/machinekit,unseenlaser/machinekit,cnc-club/linuxcnc,EqAfrica/machinekit,araisrobo/machinekit,ArcEye/machinekit-testing,cdsteinkuehler/linuxcnc,araisrobo/linuxcnc,ianmcmahon/linuxcnc-mirror,ianmcmahon/linuxcnc-mirror,bobvanderlinden/machinekit,bmwiedemann/linuxcnc-mirror,RunningLight/machinekit,unseenlaser/linuxcnc,mhaberler/machinekit,strahlex/machinekit,ianmcmahon/linuxcnc-mirror,EqAfrica/machinekit,strahlex/machinekit,bmwiedemann/linuxcnc-mirror,kinsamanka/machinekit,ArcEye/machinekit-testing,cnc-club/linuxcnc,ArcEye/machinekit-testing,jaguarcat79/ILC-with-LinuxCNC,RunningLight/machinekit,strahlex/machinekit,cdsteinkuehler/linuxcnc,Cid427/machinekit,araisrobo/linuxcnc,ArcEye/MK-Qt5,EqAfrica/machinekit,cdsteinkuehler/MachineKit,strahlex/machinekit,bobvanderlinden/machinekit,cdsteinkuehler/MachineKit,bmwiedemann/linuxcnc-mirror,narogon/linuxcnc,kinsamanka/machinekit,ikcalB/linuxcnc-mirror,Cid427/machinekit,RunningLight/machinekit,ianmcmahon/linuxcnc-mirror,EqAfrica/machinekit,ArcEye/MK-Qt5,araisrobo/linuxcnc,bmwiedemann/linuxcnc-mirror,narogon/linuxcnc,cnc-club/linuxcnc,narogon/linuxcnc,ArcEye/machinekit-testing,mhaberler/machinekit,Cid427/machinekit,cdsteinkuehler/linuxcnc,Cid427/machinekit,EqAfrica/machinekit,araisrobo/linuxcnc,ianmcmahon/linuxcnc-mirror,aschiffler/linuxcnc,ArcEye/MK-Qt5,mhaberler/machinekit,bmwiedemann/linuxcnc-mirror,cdsteinkuehler/MachineKit