Create build directory unless it exists or clear it

Author: Simsys

build-example.sh

@@ -1,3 +1,9 @@
+if [ ! -d build ];then
+    mkdir build
+else
+    rm -rf build/*
+fi
+
 cd build
 qmake ../example/qhexedit.pro
 make

build-example.sh.autosave

@@ -1,3 +1,9 @@
+if [ ! -d build ];then
+    mkdir build
+else
+    rm -rf build/*
+fi
+
 cd build
 
 # for Qt4 use qt4-qmake