Dockerfile: update Ubuntu 16.04 Dockerfile to include all deps

Update the Ubuntu 16.04 Dockerfile to add some missing dependencies and
updates, specifically:
* Need binutils 2.27 (or higher)
* Need pkg-config
* Need GPIO header file [1]

[1] Note that the current instructions for adding the GPIO header file
(linux/gpio.h) are still incomplete and compilation will fail.

Tracked-On: #2737
Signed-off-by: Geoffroy Van Cutsem <geoffroy.vancutsem@intel.com>

.travis-dockerfiles/Dockerfile.ubuntu16.04

@@ -3,7 +3,10 @@ FROM ubuntu:16.04
 
 # Install dependencies.
 RUN apt-get update \
-    && apt-get install -y gcc make vim git \
+    && apt-get upgrade -y  \
+    && apt-get install -y gcc \
+                          git \
+                          make \
                           gnu-efi \
                           libssl-dev \
                           libpciaccess-dev \
@@ -14,6 +17,39 @@ RUN apt-get update \
                           libusb-1.0-0-dev \
                           python3 \
                           python3-pip \
+                          libblkid-dev \
+                          e2fslibs-dev \
+                          pkg-config \
+    && apt-get clean
+
+# Install gcc 7.3.*
+RUN apt-get update \
+    && apt-get install -y software-properties-common \
+    && add-apt-repository ppa:ubuntu-toolchain-r/test \
+    && apt-get update \
+    && apt install g++-7 -y \
+    && update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-7 60 \
+                     --slave /usr/bin/g++ g++ /usr/bin/g++-7 \
+    && apt-get clean
+
+# Update binutils to 2.27 (no PPA found unfortunately)
+RUN apt-get update \
+    && apt-get install -y wget \
+    && wget https://mirrors.ocf.berkeley.edu/gnu/binutils/binutils-2.27.tar.gz \
+    && tar xzvf binutils-2.27.tar.gz \
+    && cd binutils-2.27 \
+    && ./configure \
+    && make \
+    && make install \
+    && cd .. \
+    && rm -fr binutils-2.27 \
+    && apt-get clean
+
+# Install header files for GPIO
+RUN apt-get update \
+    && apt-get install -y openwince-include \
+    && cp /usr/include/openwince/arm/sa11x0/gpio.h /usr/include/linux/ \
+    && cp /usr/include/openwince/common.h /usr/include/ \
     && apt-get clean
 
 RUN pip3 install kconfiglib