opensuse, fedora, centos*: Fix lint error DL4006

- [DL4006](https://github.com/hadolint/hadolint/wiki/DL4006) states that
  `-o pipefail` must be passed if using `bash` with a RUN command with
  pipes.

Author: issyl0

centos6/Dockerfile

@@ -13,8 +13,9 @@ USER linuxbrew
 WORKDIR /home/linuxbrew
 
 ENV PATH=/home/linuxbrew/.linuxbrew/bin:/home/linuxbrew/.linuxbrew/sbin:$PATH \
-	SHELL=/bin/bash \
 	USER=linuxbrew
 
+SHELL ["/bin/bash", "-o", "pipefail", "-c"]
+
 RUN yes | /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh)" \
 	&& brew config

centos7/Dockerfile

@@ -13,8 +13,9 @@ USER linuxbrew
 WORKDIR /home/linuxbrew
 
 ENV PATH=/home/linuxbrew/.linuxbrew/bin:/home/linuxbrew/.linuxbrew/sbin:$PATH \
-	SHELL=/bin/bash \
 	USER=linuxbrew
 
+SHELL ["/bin/bash", "-o", "pipefail", "-c"]
+
 RUN yes | /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh)" \
 	&& brew config

centos8/Dockerfile

@@ -13,8 +13,9 @@ USER linuxbrew
 WORKDIR /home/linuxbrew
 
 ENV PATH=/home/linuxbrew/.linuxbrew/bin:/home/linuxbrew/.linuxbrew/sbin:$PATH \
-	SHELL=/bin/bash \
 	USER=linuxbrew
 
+SHELL ["/bin/bash", "-o", "pipefail", "-c"]
+
 RUN yes | /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh)" \
 	&& brew config

fedora/Dockerfile

@@ -11,9 +11,9 @@ RUN dnf install -y curl file git glibc-locale-source make ruby rubygem-json ruby
 USER linuxbrew
 WORKDIR /home/linuxbrew
 ENV PATH=/home/linuxbrew/.linuxbrew/bin:/home/linuxbrew/.linuxbrew/sbin:$PATH \
-	SHELL=/bin/bash \
 	USER=linuxbrew
 
+SHELL ["/bin/bash", "-o", "pipefail", "-c"]
 RUN /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh)" \
 	&& brew config
 

opensuse/Dockerfile

@@ -11,9 +11,10 @@ RUN zypper --non-interactive install curl git glibc-i18ndata glibc-locale make s
 USER linuxbrew
 WORKDIR /home/linuxbrew
 ENV PATH=/home/linuxbrew/.linuxbrew/bin:/home/linuxbrew/.linuxbrew/sbin:$PATH \
-    SHELL=/bin/bash \
 	USER=linuxbrew
 
+SHELL ["/bin/bash", "-o", "pipefail", "-c"]
+
 RUN yes | /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh)" \
 	&& brew config