Description of problem:

KDevelop 5.3.1 determines clang's include path at built time and the path is hardcoded into the executable. This makes it impossible for clang to be updated without rebuilding kdevelop too. The recent clang 7.0.1 update broke the clang plugin because it was compiled with 7.0.0 and contains a hardcoded path:

---
$ strings /usr/lib64/libKDevClangPrivate.so.31 | grep 7.0.0
/usr/lib64/clang/7.0.0/include
---

The upstream 'master' branch of kdevelop includes the following patch to determine the include path at runtime. Could this be added to the Fedora package?

https://github.com/KDE/kdevelop/commit/41a0f0ce51979363c795919e00f914048d61326e

Version-Release number of selected component (if applicable):

kdevelop-5.3.1-1.fc29.x86_64
kdevelop-libs-5.3.1-1.fc29.x86_64
clang-7.0.1-1.fc29.x86_64

How reproducible:

Always

Steps to Reproduce:
1. Install the versions mentioned above
2. Run "QT_LOGGING_RULES='kdevelop.plugins.clang=true' kdevelop" in a terminal

Actual results:

Clang plugin fails with debug output:

---
kdevelop.plugins.clang: Detected Clang version: "7.0.1"
kdevplatform.shell: Could not load plugin "kdevclangsupport" , it reported the error: "The clang builtin include path \"/usr/lib64/clang/7.0.0/include\" is invalid (missing cpuid.h header).\nTry setting the KDEV_CLANG_BUILTIN_DIR environment variable manually to fix this.\nSee also: https://bugs.kde.org/show_bug.cgi?id=393779" Disabling the plugin now.
---

Expected results:

The plugin should load successfully.