Use bionic, because focal dropped support for x86

Signed-off-by: miigotu <miigotu@gmail.com>

Author: miigotu

Dockerfile

@@ -1,4 +1,4 @@
-FROM ubuntu:focal
+FROM debian:buster-slim
 LABEL maintainer="miigotu@gmail.com"
 
 ENV PS3DEV /usr/local/ps3dev

depends/check-autoconf.sh

@@ -2,4 +2,6 @@
 # check-autoconf.sh by Naomi Peori (naomi@peori.ca)
 
 ## Check for autoconf.
-autoconf --version 1>/dev/null 2>&1 || { echo "ERROR: Install autoconf before continuing."; exit 1; }
+autoconf --version 1>/dev/null 2>&1 ||
+{ echo "ERROR: Install autoconf before continuing."; exit 1; }
+# sudo apt-get install autoconf

depends/check-automake.sh

@@ -4,3 +4,4 @@
 ## Check for automake.
 automake --version 1>/dev/null 2>&1 ||
 { echo "ERROR: Install automake before continuing."; exit 1; }
+# sudo apt-get install automake

depends/check-bison.sh

@@ -3,3 +3,4 @@
 
 ( bison -V || yacc -V ) 1>/dev/null 2>&1 ||
 { echo "ERROR: Install bison before continuing."; exit 1; }
+# sudo apt-get install bison

depends/check-flex.sh

@@ -4,3 +4,4 @@
 ## Check for flex.
 flex --version 1>/dev/null 2>&1 ||
 { echo "ERROR: Install flex before continuing."; exit 1; }
+# sudo apt-get install flex

depends/check-gcc.sh

@@ -4,3 +4,4 @@
 ## Check for gcc.
 gcc --version 1>/dev/null 2>&1 ||
 { echo "ERROR: Install gcc before continuing."; exit 1; }
+# sudo apt-get install gcc

depends/check-gmp.sh

@@ -7,3 +7,4 @@
 [ -f /usr/local/include/gmp.h ] ||
 [ -f /opt/csw/include/gmp.h ] ||
 { echo "ERROR: Install gmp before continuing."; exit 1; }
+# sudo apt-get install libgmp-dev

depends/check-libelf.sh

@@ -6,4 +6,5 @@
 [ -f /opt/local/include/libelf.h ] ||
 [ -f /opt/local/include/libelf/libelf.h ] ||
 [ -f /usr/local/include/libelf/libelf.h ] ||
-{ echo "ERROR: Install libelf before continuing."; exit 1; }
+{ echo "ERROR: Install libelf before continuing."; exit 1; }
+# sudo apt-get install libelf-dev

depends/check-libtool.sh

@@ -4,3 +4,4 @@
 ## Check for libtool.
 { libtool --version || libtool -V; } 1>/dev/null 2>&1 ||
 { echo "ERROR: Install libtool before continuing."; exit 1; }
+# sudo apt-get install libtool-bin

depends/check-make.sh

@@ -4,3 +4,4 @@
 ## Check for make.
 ${MAKE:-make} -v 1>/dev/null 2>&1 ||
 { echo "ERROR: Install make before continuing."; exit 1; }
+# sudo apt-get install make