kdevplatform: Add a patch I landed upstream to fix parallel build errors.

From the commit message:
n
  filetemplates plugin: Make testfiletemplates depend on kdevfiletemplates

  There is currently no dependency between both targets, however some of
  the files built by both testfiletemplates and kdevfiletemplates (such as
  classidentifierpage.cpp) depend on ui files that only the latter target
  generates. This means that if one does make testfiletemplates the build
  fails like this:

    /tmp/kdevplatform/plugins/filetemplates/classidentifierpage.cpp:23:25:
    fatal error: ui_newclass.h: No such file or directory

1 files changed, 27 insertions, 0 deletions

diff --git a/devel/kdevplatform/files/patch-git_dd18e9a b/devel/kdevplatform/files/patch-git_dd18e9a
new file mode 100644
index 000000000000..c84e257bcba7
--- /dev/null
+++ b/devel/kdevplatform/files/patch-git_dd18e9a
@@ -0,0 +1,27 @@
+commit dd18e9a13558cbe519c382d3fe358ae97e39cd38
+Author: Raphael Kubo da Costa <rakuco@FreeBSD.org>
+Date:   Thu Mar 17 15:32:21 2016 +0100
+
+    filetemplates plugin: Make testfiletemplates depend on kdevfiletemplates
+
+    There is currently no dependency between both targets, however some of
+    the files built by both testfiletemplates and kdevfiletemplates (such as
+    classidentifierpage.cpp) depend on ui files that only the latter target
+    generates. This means that if one does make testfiletemplates the build
+    fails like this:
+
+      /tmp/kdevplatform/plugins/filetemplates/classidentifierpage.cpp:23:25:
+      fatal error: ui_newclass.h: No such file or directory
+
+    Differential Revision:	https://phabricator.kde.org/D1160
+
+--- plugins/filetemplates/CMakeLists.txt
++++ plugins/filetemplates/CMakeLists.txt
+@@ -81,6 +81,7 @@ main.cpp
+ )
+ 
+ kde4_add_executable(testfiletemplates ${test_srcs})
++add_dependencies(testfiletemplates kdevfiletemplates)
+ 
+ target_link_libraries(testfiletemplates
+     ${KDE4_KDECORE_LIBS}