travis: BUILD_TYPE => T

(to make the full line appear nicer on travis web UI)

.travis.yml

@@ -23,39 +23,39 @@ matrix:
     include:
         - os: linux
           compiler: gcc
-          env: BUILD_TYPE=normal
+          env: T=normal
         - os: linux
           compiler: clang
-          env: BUILD_TYPE=debug
+          env: T=debug
         - os: osx
           compiler: gcc
-          env: BUILD_TYPE=debug
+          env: T=debug
         - os: osx
           compiler: gcc
-          env: BUILD_TYPE=debug C=--with-ssl=/usr/local/opt/openssl
+          env: T=debug C=--with-ssl=/usr/local/opt/openssl
         - os: osx
           compiler: gcc
-          env: BUILD_TYPE=debug C=--with-ssl=/usr/local/opt/libressl
+          env: T=debug C=--with-ssl=/usr/local/opt/libressl
         - os: osx
           compiler: clang
-          env: BUILD_TYPE=debug C="--without-ssl --with-darwinssl"
+          env: T=debug C="--without-ssl --with-darwinssl"
         - os: osx
           compiler: clang
-          env: BUILD_TYPE=normal
+          env: T=normal
         - os: linux
           compiler: gcc
           dist: trusty
-          env: BUILD_TYPE=cmake
+          env: T=cmake
         - os: linux
           compiler: clang
           dist: trusty
-          env: BUILD_TYPE=cmake
+          env: T=cmake
         - os: linux
           compiler: gcc
-          env: BUILD_TYPE=coverage
+          env: T=coverage
         - os: linux
           compiler: gcc
-          env: BUILD_TYPE=distcheck
+          env: T=distcheck
 
 install:
   - pip install --user cpp-coveralls
@@ -73,7 +73,7 @@ before_script:
 
 script:
     - |
-        if [ "$BUILD_TYPE" = "coverage" ]; then
+        if [ "$T" = "coverage" ]; then
              export CC="gcc-4.8"
              ./configure --enable-debug --disable-shared --enable-code-coverage
              make
@@ -84,26 +84,26 @@ script:
              coveralls --gcov /usr/bin/gcov-4.8 --gcov-options '\-lp' -i src -i lib -i lib/vtls -i lib/vauth -e tests -e docs
         fi
     - |
-        if [ "$BUILD_TYPE" = "debug" ]; then
+        if [ "$T" = "debug" ]; then
              ./configure --enable-debug --enable-werror $C
              make
              make TFLAGS=-n test-nonflaky
         fi
     - |
-        if [ "$BUILD_TYPE" = "normal" ]; then
+        if [ "$T" = "normal" ]; then
              ./configure --enable-warnings --enable-werror $C
              make
              make test-nonflaky
         fi
     - |
-        if [ "$BUILD_TYPE" = "cmake" ]; then
+        if [ "$T" = "cmake" ]; then
              mkdir build
              cd build
              cmake ..
              make
         fi
     - |
-        if [ "$BUILD_TYPE" = "distcheck" ]; then
+        if [ "$T" = "distcheck" ]; then
             ./configure
             make
             ./maketgz 99.98.97