Add linkermap target for size analysis (#227)

* correct url link for led glasses driver
* add linkermap to ci

.github/workflows/githubci.yml

@@ -63,11 +63,18 @@ jobs:
     - name: Checkout Code
       uses: actions/checkout@v1
       with:
-        submodules: true      
+        submodules: true
+
+    - name: Checkout linkermap
+      uses: actions/checkout@v2
+      with:
+         repository: hathach/linkermap
+         path: linkermap
         
     - name: Install Toolchains
       run: |
         pip3 install adafruit-nrfutil uritemplate requests intelhex
+        pip3 install linkermap/
         npm install --global xpm
         # 9.3.1-1.2.1 is xpack modified version which significantly increased compiled size to 6-7KB and cause flash overflow.
         # Skip this version for now, we will try again with next official release from ARM
@@ -78,6 +85,9 @@ jobs:
       run: |
         make BOARD=${{ matrix.board }} all
         make BOARD=${{ matrix.board }} copy-artifact
+
+    - name: Linker Map
+      run: make BOARD=${{ matrix.board }} linkermap
       
     - uses: actions/upload-artifact@v2
       with: