compile dlib with our gcc

dependencies/dlib/meta.yaml

@@ -15,28 +15,31 @@ source:
     - add_global_cxx_release.patch
 
 build:
-  number: 0
+  number: 1
 
 requirements:
   build:
-   - python
-   - toolchain 2.3.2
-   - cmake
-   - mkl   # [not win]
-   - numpy x.x
-   - boost 1.61.*
-   - jpeg 9b                      # [not win]
-   - libpng 1.6.27
-   - sqlite 3.13.*                # [not win]
+    - python
+    - toolchain 2.3.2
+    - gcc 4.8.5  # [linux]
+    - libgcc 4.8.5  # [linux]
+    - cmake
+    - mkl   # [not win]
+    - numpy x.x
+    - boost 1.61.*
+    - jpeg 9b                      # [not win]
+    - libpng 1.6.27
+    - sqlite 3.13.*                # [not win]
 
   run:
-   - python
-   - mkl    # [not win]
-   - numpy x.x
-   - boost 1.61.*
-   - jpeg 9b                      # [not win]
-   - libpng >=1.6.27,<1.7
-   - sqlite 3.13.*                # [not win]
+    - python
+    - libgcc >=4.8.5  # [linux]
+    - mkl    # [not win]
+    - numpy x.x
+    - boost 1.61.*
+    - jpeg 9b                      # [not win]
+    - libpng >=1.6.27,<1.7
+    - sqlite 3.13.*                # [not win]
 
 test:
   files: