Add recipe for tecgraf im.

The libs have no soname (as usual with tecgraf products), and
prepareInstalledDevelLibs isn't working. What can we do to fix that?

media-libs/im/patches/im-3.8.patchset

@@ -0,0 +1,40 @@
+From 25622aa79bc39c13f2d8f55a6a0572e34d06b962 Mon Sep 17 00:00:00 2001
+From: Adrien Destugues <pulkomandy@pulkomandy.tk>
+Date: Thu, 14 Nov 2013 21:46:53 +0100
+Subject: Make tecmake aware of Haiku and the lack of libm.
+
+
+diff --git a/tec_uname b/tec_uname
+index cc89349..fc982e0 100755
+--- a/tec_uname
++++ b/tec_uname
+@@ -148,6 +148,11 @@ ComputeSystemPaths()
+ 
+   TEC_SYSTEM_INC=/usr/include
+   
++  if [ $TEC_SYSNAME == Haiku ]; then
++  	TEC_SYSTEM_LIB=`finddir B_SYSTEM_LIB_DIRECTORY`
++  	TEC_SYSTEM_INC=`finddir B_SYSTEM_HEADERS_DIRECTORY`
++  fi
++
+   TEC_LUA_LIB=$TEC_SYSTEM_LIB/lua/$LUA_VER
+ }
+ 
+diff --git a/tecmake.mak b/tecmake.mak
+index f799a07..f317af2 100755
+--- a/tecmake.mak
++++ b/tecmake.mak
+@@ -1177,7 +1177,9 @@ ifdef USE_X11
+   STDINCS += $(X11_INC)
+ endif
+ 
+-LIBS += m
++ifneq "$(TEC_SYSNAME)" "Haiku"
++  LIBS += m
++endif
+ 
+ ifneq ($(findstring cygw, $(TEC_UNAME)), )
+   WIN_OTHER := Yes
+-- 
+1.8.3.4
+