QbsPM: De-static const strings in constants header

Having a static variable in a header is strange.

Change-Id: I42c0244f6e73f1cbf530e704a36b96bf5b85a017
Reviewed-by: Jake Petroules <jake.petroules@qt.io>
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

src/plugins/qbsprojectmanager/qbsprojectmanagerconstants.h

@@ -60,19 +60,19 @@ const char QBS_CLEANSTEP_ID[] = "Qbs.CleanStep";
 const char QBS_INSTALLSTEP_ID[] = "Qbs.InstallStep";
 
 // QBS strings:
-static const char QBS_VARIANT_DEBUG[] = "debug";
-static const char QBS_VARIANT_RELEASE[] = "release";
+const char QBS_VARIANT_DEBUG[] = "debug";
+const char QBS_VARIANT_RELEASE[] = "release";
 
-static const char QBS_CONFIG_VARIANT_KEY[] = "qbs.buildVariant";
-static const char QBS_CONFIG_PROFILE_KEY[] = "qbs.profile";
-static const char QBS_INSTALL_ROOT_KEY[] = "qbs.installRoot";
-static const char QBS_CONFIG_DECLARATIVE_DEBUG_KEY[] = "Qt.declarative.qmlDebugging";
-static const char QBS_CONFIG_QUICK_DEBUG_KEY[] = "Qt.quick.qmlDebugging";
+const char QBS_CONFIG_VARIANT_KEY[] = "qbs.buildVariant";
+const char QBS_CONFIG_PROFILE_KEY[] = "qbs.profile";
+const char QBS_INSTALL_ROOT_KEY[] = "qbs.installRoot";
+const char QBS_CONFIG_DECLARATIVE_DEBUG_KEY[] = "Qt.declarative.qmlDebugging";
+const char QBS_CONFIG_QUICK_DEBUG_KEY[] = "Qt.quick.qmlDebugging";
 const char QBS_FORCE_PROBES_KEY[] = "qbspm.forceProbes";
 
 // Icons:
-static const char QBS_GROUP_ICON[] = ":/qbsprojectmanager/images/groups.png";
-static const char QBS_PRODUCT_OVERLAY_ICON[] = ":/qbsprojectmanager/images/productgear.png";
+const char QBS_GROUP_ICON[] = ":/qbsprojectmanager/images/groups.png";
+const char QBS_PRODUCT_OVERLAY_ICON[] = ":/qbsprojectmanager/images/productgear.png";
 
 // Toolchain related settings:
 const char QBS_TARGETOS[] = "qbs.targetOS";